CN1143567C - Systems and methods for providing information to emergency service centers - Google Patents
Systems and methods for providing information to emergency service centers Download PDFInfo
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- CN1143567C CN1143567C CNB988064723A CN98806472A CN1143567C CN 1143567 C CN1143567 C CN 1143567C CN B988064723 A CNB988064723 A CN B988064723A CN 98806472 A CN98806472 A CN 98806472A CN 1143567 C CN1143567 C CN 1143567C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/50—Connection management for emergency connections
Abstract
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide techniques which pass the mobile unit's phone number along to an appropriate emergency service centers in addition to location information. This information can be made available to an adjunct monitoring system by either changing the mobile station identity used to package (Layer 2) an access attempt or by commanding a mobile or base station to explicitly transmit the mobile unit's dialable number during an emergency access so that the adjunct system can read and forward this number.
Description
Background:
Applicant's invention relates generally to wireless communication system, and for example honeycomb or satellite system, and more specifically relate to and support in these systems and strengthen technology to the urgent call handling procedure.
The development of commercial radio communication, and the volatile development of (particularly) cellular radiotelephone system has changed the mode of people's communications.Once investigation shows has 80% to be in order to improve individual's fail safe in the people that bought mobile communication equipment and service appointment.Presumably, there are many people will wish under emergency situations, to utilize its mobile device to help oneself among these users, for example, when its motor vehicles have damaged or in needs medical treatment fast and/or police's emergency situations of replying.To wish that in these circumstances wireless communication system can determine the location of mobile unit independently, particularly not know under the his or her pinpoint situation the user.In addition, expection FCC will require the network operator that the position of emergency caller is transmitted to the emergency services supplier soon.
There are many technology that can be used for producing the mobile unit locating information.In the first kind, mobile unit can be estimated its position and send a kind of message that has its coordinate when initiating urgent call.This point can be passed through, and for example, realizes for mobile unit provides global positioning system (GPS) receiver from gps satellite reception locating information.So mobile unit just can be to this information of system transmissions, and system will then be transmitted to the emergency services supplier to it.Yet in order to comprise the GPS receiver, this requirement is done great adjustment to existing mobile unit, and also requiring has extra signaling between mobile unit and base station.
Flexible ground sends signal and can be used for determining the position of mobile unit from the base station of its received signal to mobile unit.For the locating information of mobile unit is provided, what be proposed has multiple technologies, comprise the mobile unit signal decay, arrive the signal of angle (Angle-of-arrival) and mobile unit at the time of advent of different base station poor (TDOA).For example, can consult SPIE Vol.2602, the article of being write by Louis A.Stilp among the pp.134-144 that is entitled as " the difference technology time of advent that is used to locate the arrowband cellular signal ".These solutions also have its shortcoming, comprise that needs revise many existing base stations, for example to adopt aerial array in order supporting to arrive the angle technology or in order to support the TDOA technology transmission of base station to be carried out synchronously.
The 3rd class strategy of positioning mobile units in wireless communication system relates to the setting of subsystem, for example this be a kind of can with wireless communication system fully independently or can be to share multiple parts (for example antenna) with wireless communication system but but be independent of the system that it carries out signal processing.For example, as a kind of expedient scheme that the mobile unit location is provided under the condition of the existing base station of enormous amount in not modification system, this may be good.For example, the equipment described in the imaginary picture of primitive people 1, wherein attached scanning element is not that the base station with wireless communication system is located at.Wherein base station 1 is supported within the cellular cell 2 radio communication of (particularly, and between the mobile unit 3).One is monitored by the access to 3 pairs of systems of mobile unit of the subsystem of scanning element 4,5 and 6 parts ground expression.When mobile unit 3 was initiated urgent the access, adjunct unit 4,5 and 6 detected current urgent the access by the existence of one group of emergency sign in (for example) originating information or based on the dial number that cries.So adjunct unit just can provide information to localization process center 7 by utilizing the transmission of mobile unit on control channel or Traffic Channel.And the information that localization process center 7 then utilizes a plurality of adjunct unit to be provided for example adopts triangulo operation to try to achieve the position of mobile unit 3, and gives emergency 8 with this position message.Can in the U.S. Patent No. that is entitled as " cell phone navigation system " 5,327,144 that people such as Stilp have, find more exemplary usages about subsystem.
Yet a problem relevant with the use of subsystem relates to the desirability that urgent center is shone upon the urgent call that mobile unit is located and wireless communication system is received that subsystem provided mutually.Imagine this problem under the condition of the system of operation at foundation IS-136 (three types mobile radio station sign is wherein arranged).Sign used in mobile station identity number (MIN) and early the simulation AMPS system is identical, and is the binary representation of mobile radio station telephone number, is also referred to as telephone directory book number (DN).Yet if the needs that have the whole world to move, these technology and other are used to distinguish that the difference between the technology of mobile unit is the needs coordinations.
As one of multiple reason, this has caused the generation of international mobile station identification code (IMSI), and it is a kind of decimal system mark number that contains promising 15 ten's digits at most.Although IMSI can dial the number that cries, the mobile station identity number (MSID) that it has solved the problem of international roaming really and has been encoded into 50bit aloft transmits on the interface.Yet owing to the length of IMSI, in the single beep-page message that wireless communication system transmitted, can carry three pagings of adopting MIN, but can only carry a paging of adopting IMSI.Therefore, adopt IMSI to reduce the paging capacity (the paging amount in the unit interval) of every control channel.
In order to overcome this difficulty and further to improve with respect to the paging capacity of MIN and the ability of international roaming still can be provided, introduced interim mobile radio station sign (TMSI).In IS-136, the length of TMSI is 20 to 24bit, and this causes having 4 or 5 pagings respectively in each beep-page message.For after mobile unit distributed TMSI, cellular system just can find mobile unit by TMSI in the TMSI assigning process.When mobile unit advances in " newly " system, will distribute a new TMSI for mobile unit by the control of " newly " system.Except being used to get in touch with the mobile unit, when mobile radio station is got in touch with (just initiating access attempts) to cellular system, also adopt same identity type usually.Therefore, have (being also referred to as " activation the ") mobile unit that has distributed TMSI for one, this may be exactly the sign that is used for the access message between mobile unit and the system by convention.
But wireless system has and but these signs is translated into the dial number of mobile unit and with urgent call with should dial number offer the ability of emergency.Yet the employing of IMSI and TMSI has proposed problem to attached navigation system.Particularly, " telephone number " of mobile unit 3 do not occur in subsidiary scan unit 4,5 and 6 signalings that monitored usually, and subsystem can not keep the tracking of each TMSI that wireless communication system is distributed.So, although the position that subsystem can estimated mobile unit for example resembles the U.S. Patent No. 5 that people such as Stilp have, 327, described in 144 like that, but subsystem but can not be transmitted to application person with " telephone number ", for example emergency 8.Will encounter difficulties when therefore, emergency 8 is shone upon the positional information of receiving from subsystem mutually with the urgent call of receiving from wireless system.Correspondingly, need provide technology so that receive information for emergency about the associated telephone number of mobile unit that carries out urgent access to wireless communication system.
Brief summary of the invention:
According to exemplary embodiment of the present invention, these shortcomings and the restriction of handling urgent call will be overcome.For example, in a single day mobile unit recognize and will carry out urgent call, just can ignore common access rules and the MIN that adopts it inserts a part in message as its system.Adopt this method, suitable emergency be caught and be forwarded to subsystem just can to this information.Flexible ground, perhaps meanwhile, system can use MIN to come the message on the down link is addressed, and subsystem also can monitor this.
According to the exemplary embodiment of another kind, in a single day mobile unit is recognized and will be carried out urgent call, between system's access periods, can use its predefined mobile station identity type to address, yet but its dial number is included in an interior part as the pay(useful) load that inserts.Similarly, system (base station just) but can transmit the dial number of this mobile unit as a kind of address the response of urgent access attempts.Under any situation, this subsystem all can be read this information and it is forwarded to emergency.
To brief description of the drawings
Read this description with reference to the accompanying drawings, can understand applicant's characteristic feature of an invention and advantage better, wherein:
Accompanying drawing 1 is a kind of diagram of exemplary cellular radiotelephone system, and this system has the attached surveillance that is used for providing to suitable emergency of the present invention the mobile unit locating information;
Accompanying drawing 2 has been illustrated a kind of exemplary base station and mobile unit according to the present invention's running;
Accompanying drawing 3 is parts of illustrating the chart in each territory of RACH according to IS-136;
Accompanying drawing 4 is the flow charts of illustrating according to first kind of exemplary embodiment of the present invention;
Accompanying drawing 5 is the flow charts of illustrating according to second kind of exemplary embodiment of the present invention;
Describe in detail
Following description is stated according to cellular radiotelephone system,, the invention that should be appreciated that the applicant can be applied to the wireless system of other types but being not limited to this environment, for example, adopt satellite that the system of radio communication service is provided, voice trunking (voice-trunked) system such as land mobile radio (Land Mobile Radio) (LMR) or (SMR) system or the like of PMR private mobile radio (Special Mobile Radio).Equally, below described exemplary embodiment be (TDMA) to propose in the scene of communication system in time division multiple access (Time DivisionMultiple Access), and those of skill in the art will appreciate that the present invention can be applied to DTC and the DCC mixture that transmission information is adopted between base station and mobile radio station.
As just example, consider digital cellular radiotelephone systems in vogue, that be called digital AMPSAdvanced Mobile Phone Service (D-AMPS) now in the North America, the one Partial Feature is set forth in the interim standard I S-54B that is published by Electronic Industries Association and telecommunications industry association (EIA/TIA), among " Dual-Mode Mobile Station-Base Station CompatibilityStandard (dual mode mobile station-base station compatibility standard) ".
Owing to have in a large number existing consumer based on the equipment of the employing frequency division multiple access (FDMA) that only runs on simulation field, IS-54B is the standard of a kind of so double mode (analog-and digital-), and it provides the simulation compatibility and the ability of digital communication also is provided synergistically.For example, the IS-54 standard both provided FDMA Analog Voice Channel (AVC) that TDMA digital service channel (DTC) also is provided, and system operator can dynamically replace another kind with one type, so that adapt to the professional pattern that fluctuates between simulation and the digital subscriber.The wireless carrier signal of frequency modulation has been adopted in the enforcement of AVC and DTC, and it has near the frequency 800 megahertzes (MHz), so that each wireless channel has the spectrum width of 30 kilo hertzs (KHz).
The IS-54-B standard also provides the control channel (ACC) of a plurality of simulations, and origination system inserts and system management messages is sent to mobile unit thereon.Be called as the standard that the follow-up standard of IS-136 has been replenished digital control channel (DCC).This standard is quoted at this, for your guidance.
In the TDMA cellular radiotelephone system, each wireless channel is divided into a series of time slot, and each time slot all comprises the pulse train of the information (for example passing through digitally coded voice snatch of conversation) from data source.Time slot is formed the continuous tdma frame with preset width.According to IS-54B, each tdma frame is formed and is had the width of 40 milliseconds (msec) by six continuous time slot.Therefore, each frame can carry one to six channel (for example, one to six wireless connections), and it can be to be used for the DTC of the information that transmits between base station and mobile radio station and the mixture of DCC.
Accompanying drawing 2 has been represented the diagram of a kind of exemplary cellular mobile radiotelephone system, wherein comprises exemplary base station 110 and mobile unit 120.The base station comprises control and the processing unit 130 that is connected to MSC 140, and then MSC is connected to the PSTN (not shown).The general situation of so in the art cellular radiotelephone system is well-known, as the U.S. Patent No. 5 that is entitled as " switching (Neighbor-Assisted Handoff in a Cellular CommunicationSystem) of in cellular communication system, assisting " that belongs to people such as Wejke by the adjacent area, 175,867 and the U.S. Patent application No.07/967 that is entitled as " multimode signal processing (Multi-mode Signal Processing) " that submits on October 27th, 1992, described in 027 like that, these two pieces of files are all in conjunction with in this application for your guidance.
A plurality of Traffic Channels are handled via a controlled Traffic Channel transceiver 150 with processing unit 130 controls in base station 110.Equally, each base station all comprises the control channel transceiver 160 that can handle an above control channel.Control channel transceiver 160 is controlled the control with processing unit 130.Control channel transceiver 160 on the control channel of base station or cellular cell to the mobile radio station broadcast control information that locks onto this control channel.Should be understood that to work in the control channel of sharing same carrier frequency and the transceiver 150 and 160 of Traffic Channel can be realized in individual equipment, as business in the mobile radio station and control transceiver 170.
After the digital control channel locating information that the mobile unit 120 of free time for example finds by being used on the Traffic Channel had been located control channel, next it can utilize it professionally to read the control information of transmitting on this control channel (for example beep-page message) with control transceiver 170.The reader can be with reference to the U.S. Patent application No.08/331 that is entitled as " method and apparatus (Method and Apparatus forLocating a Digi tal Control Channel in a RadiocommunicationSystem) of location digital control channel in wireless communication system " that submitted on October 31st, 1994, and 711 (here they are combined in the application for your guidance) obtain the details that relate to the technology of locating digital control channel more.When hope has being connected between mobile radio station 120 and the system, transceiver 170 will be tuned to one by the specified Traffic Channel of system.
In case the control channel that mobile unit has found the rule that satisfies minimal set (for example, mobile radio station must be higher than receive channel on the intensity of minimum received signal), mobile radio station can further be weighed this control channel according to certain optimum system choosing item of being stored in the mobile unit.For example, if this cellular cell is forbidden (described in IS-136), perhaps the network operator of this cellular cell is not preferred network operator (adopting the system operator code (SOC) among the IS-136), and then next mobile unit can try to seek another control channel.
Must listening paging message and transmission originating information if this control channel will be intercepted or lock onto to the optimum system choosing item that the data that cellular system is broadcasted (this part in DCC is commonly referred to Broadcast Control Channel or BCCH) on the control channel satisfy in the mobile unit is stored, mobile unit.Yet meanwhile, mobile unit is that potential cell reselection is prepared, because mobile radio station may be at the volley and leave the zone of selecting for the first time that control channel covered.There are many prior aries to be used for telling mobile unit can where (for example, adopted one or more frequency, the moment and code) find adjacent control channel, so that given its at that time under the condition of present position, thereby mobile unit can be tested and compare with at that time control channel and finds best control channel to come to be the mobile unit service these choices.For example, can check the U.S. Patent No. 5 that is entitled as " communication management method in radio telephone system and equipment (Method and Apparatus forCommunication Control in a Radiotelephone System) " that Raith and Muller have, 353,332 or Karlsson had is entitled as the U.S. Patent No. 5 of " best server in the hierarchical cellular wireless system is selected (Best Server Selection in LayeredCellular Radio System) ", 499,386, here they are combined in the application for your guidance.
As mentioned above, for emergency 8, the telephone number that receives the mobile unit of initiating urgent call is important.For example, initial calling may have been interrupted, thereby can insert this telephone number and will make emergency can call out this specific mobile unit so that rebulid communication link.And when SOS was filed, telephone number may have certain importance.In addition, if emergency is not received telephone number from subsystem, it is difficult so the positional information that receives from subsystem being shone upon mutually with the urgent call that receives from cellular system.
When mobile unit was initiated access attempts in order to connect with wireless communication system, it finished this point by access channel or control channel transmission message in up link.In the system of IS-136 defined, uplink control channel is called Random Access Channel (RACH).In accompanying drawing 3, duplicated the regulation in the territory of a part of second layer RACH agreement.As specific here argumentation, only interested and be described below in type of sign (IDT) territory and mobile radio station sign (MSID) territory.In these territories, can see when mobile unit initiation system on RACH inserts, can send any one among the IMSI of the MIN of TMSI, 34 bits of TMSI, 24 bits of 20 bits or 50 bits.
In fact, if mobile unit has effectively (defining as the chapters and sections 8.1.2.2 among the IS-136) TMSI, then it will transmit its TMSI value in the MSID territory.If mobile unit only has IMSI, then it will adopt IMSI as its MSID.Similarly, if mobile unit only has MIN, then it will adopt MIN as its MSID.If mobile unit had both had IMSI and had also had MIN, then according to the rule of the same definition in IS-136 and from these identification codes, select one.It should be noted that if according to the rule that defines by this standard, will cause having only less relatively mobile unit to provide its MIN as a part that inserts pulse train.So attached station 4,5 and 6 will receive TMSI or IMSI in a plurality of uplink burst.
Under these situations, a kind of exemplary embodiment according to the present invention, attached station can and connect same expression by the locating information that localization process center 7 produces together and alternatively with this TMSI information does not have the sign of available permanent mobile radio station identification code (PMSID) to be transmitted to emergency 8 together.Although TMSI does not have use for emergency callback mobile unit, but emergency 8 also can preserve it get off for later use, for example, the competent departments concerned can be inconjunction with this TMSI in the cellular radio Communication system available information together, follow the trail of DN according to the moment of this TMSI and calling afterwards, thereby pick out this mobile unit.If adopted IMSI, then carve information when not required, because the variation of IMSI occurs over just user's reservation recording in the system of ancestral home when changing (this is not frequent event).
Perhaps, may wish to guarantee that emergency 8 can receive the telephone number of mobile unit 3 really.According to the another embodiment of the present invention that is described in the mode of flow chart in accompanying drawing 4, when mobile unit detects when initiating urgent call, it will adopt its MIN rather than TMSI or IMSI.Wherein, in step 400, mobile unit weighs to determine its whether urgent call to the calling of initiating.Its realization can be described in the U.S. Patent Application Serial Number of for example submitting to 08/843,752 that is entitled as " System and method for (Systems and Methods for Identifying Emergency Calls inRadiocommunication Systems) that identified emergency is called out in wireless communication system " (here for for reference and especially it is incorporated into the application) on April 22nd, 1997 like that.
If this calling is not urgent call, then flow process proceeds to module 410, and wherein mobile unit adopts the type of sign of " normally " to carry out access attempts.For example, imagine a mobile unit that meets IS-136 and have effective TMSI, then in the RACH message that this mobile unit transmits, will adopt this numerical value.If calling out is urgent call, flow process then proceed to module 420 then, but wherein mobile radio station is selected a kind of type of sign (if any) that is equivalent to its dial number.Utilize above-mentioned example, this IS-136 mobile unit will adopt its MIN rather than its effective TMSI or IMSI in the RACH message that transmits.Like this, attached scanning movement will receive the MIN of mobile unit and this information will be transmitted to emergency 8 together with the locating information that is produced by localization process center 7.
The exemplary embodiment of another kind according to the present invention, mobile unit according to the sign of system's predetermined rule (had for example both adopted, in the territory of the above-mentioned second layer, use MIN, IMSI or TMSI), but the dial number (DN) that also comprises mobile unit simultaneously is as a part (for example, as the part in the 3rd layer of message) that inserts.Mobile unit can be preserved this DN, and it can be input in the unit by the user.Flexible ground, for example in the unit according to the IS-136 running, DN can be used as air interface activating service (over-the-air interfaceactivation service) part (OATS) and downloads in the phone.
In addition, when buying mobile unit, it may not comprise sign (for example, MIN, IMSI).For IS-136, mobile unit can adopt special for this reason access and (AMIN) insert from the activation MIN (Activating MIN) that Electronic Serial Number (ESN) constructs.So if need carry out urgent call this moment user, mobile unit will adopt AMIN also promptly to insert as above-mentioned as PMSID in the RACH territory.
Otherwise if the user adopts this AMIN to carry out initial access to " normally " of system, this etching system can (with out of Memory) be downloaded the sign (for example, MIN and/or IMSI) of this mobile unit.May there be the situation of a plurality of signs in attention, and each all interrelates with separately User Agreement.For example, may different kinsfolks can use same mobile unit, wherein each user activates different user's reservations.Flexible ground, single user may have a plurality of user's reservations, because he or she may keep activating to avoid wandering fee in two systems.Under any situation, for the sign (can be MIN and/or IMSI for IS-136) of each logic, the message of download all may comprise the DN that is interrelating.So for current user's reservation, the user can make that DN shows, and also this DN system of being sent to can be gone during urgent call.
According to the exemplary embodiment of another kind, attached system can obtain this DN by the control channel of intercepting down link.For example, system may adopt the MIN of mobile unit to reply this mobile unit subsystem and then can read this information on DCC.Yet this has imagined mobile unit and intercepted its MIN and its type of sign of using as the address, for example TMSI just at the same time when inserting.If special system protocol does not also require that mobile unit intercepts two kinds of type of signs simultaneously, then can adopt and the employed consistent type of sign of mobile unit, and DN is included in the message as the part of payload in system when the mobile radio station transmission is replied.
The flow chart of accompanying drawing 5 is summarized being included in the exemplary embodiment that transmits DN in the 3rd layer significantly, and technology wherein is general for the running (that is to say up link or down link) of mobile unit and base station.Wherein, in module 500, call identifying is urgent or non-emergent.If calling is non-emergency call then handles this message (for example RACH or ARCH message) according to suitable standard and system convention in module 510.Otherwise, be urgent call if call out, but the specified mobile radio station sign of standard or system that then dial number is included in (step 520) in the message and is used for second layer addressing in module 530 comes this message is transmitted.
Certainly, again the present invention is embodied in when not breaking away from spirit of the present invention that to be different from particular form described above be possible.Therefore, above-mentioned embodiment is only illustrative and can not think binding on any way.Scope of the present invention is to determine by following claim rather than by the description of front, and all distortion and equivalents of falling in the claim scope all will be thought to be contained in wherein.
Claims (11)
1. method of handling urgent call in wireless communication system comprises the following step:
Distinguish that in mobile unit calling out is urgent call or non-emergency call;
If this calling is urgent call then selects first kind of mobile unit sign;
If this calling is non-emergency call then selects second kind of mobile unit sign; And
Adopt this selected mobile unit sign to transmit message to described system from this mobile unit.
2. the method for handling urgent call in wireless communication system as claimed in claim 1, wherein said first kind of mobile unit sign is mobile identification number (MIN).
3. the method for handling urgent call in wireless communication system as claimed in claim 1, wherein said first kind of mobile unit sign are to activate mobile identification number (AMIN).
4. the method for handling urgent call in wireless communication system as claimed in claim 1, wherein said second kind of mobile unit sign is interim mobile radio station sign (TMSI).
5. the method for in wireless communication system, handling urgent call as claimed in claim 1, but wherein said first kind of mobile unit sign comprises the dial number that interrelates with mobile unit.
6. method of handling urgent call in wireless communication system comprises the following step:
Distinguish that in mobile unit calling out is urgent call or non-emergency call;
But the dial number that interrelates with mobile unit that if this calling is urgent call then retrieve is stored;
If this calling is non-emergency call then retrieves interim mobile radio station sign (TMSI); And
But transmit the message that comprises above-mentioned dial number or TMSI to described system.
7. the method for handling urgent call in wireless communication system as claimed in claim 6 further comprises the following step:
By the user of this mobile unit but above-mentioned dial number is input in this mobile unit and goes; And
But storage should dial number.
8. the method for handling urgent call in wireless communication system as claimed in claim 6 further comprises the following step:
But transmit above-mentioned dial number to this mobile unit by air interface; And
But storage should dial number.
9. remote terminal comprises:
Be used to distinguish that calling out is the urgent call or the equipment of non-emergency call;
Be urgent call then select the equipment of first kind of mobile unit sign if call out;
Be non-emergency call then select the equipment of second kind of mobile unit sign if call out; And
Adopt above-mentioned selected mobile unit sign to transmit the equipment of message from this mobile unit.
10. one kind is the mobile unit forwarding position of mobile unit of initiation urgent call and the method for mobile unit sign in wireless communication system, comprises following steps:
In subsystem, in the signaling data of the urgent call associated of initiating with described mobile unit, receive this mobile unit sign;
Determine the position of this mobile unit; And
Transmit above-mentioned position and mobile unit sign from subsystem to emergency.
11. the method for transmitting position of mobile unit and mobile unit sign in wireless communication system for the mobile unit of initiating urgent call as claim 10 further is included in not via the step that under the situation of wireless communication system the mobile unit sign is transmitted to emergency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/844883 | 1997-04-22 | ||
| US08/844,883 | 1997-04-22 | ||
| US08/844,883 US6477362B1 (en) | 1997-04-22 | 1997-04-22 | Systems and methods for providing information to emergency service centers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1262017A CN1262017A (en) | 2000-08-02 |
| CN1143567C true CN1143567C (en) | 2004-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB988064723A Expired - Fee Related CN1143567C (en) | 1997-04-22 | 1998-04-01 | Systems and methods for providing information to emergency service centers |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6477362B1 (en) |
| CN (1) | CN1143567C (en) |
| AU (1) | AU743553B2 (en) |
| BR (1) | BR9808968A (en) |
| CA (1) | CA2287896A1 (en) |
| DE (1) | DE19882325T1 (en) |
| GB (1) | GB2341761B (en) |
| WO (1) | WO1998048392A2 (en) |
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- 1997-04-22 US US08/844,883 patent/US6477362B1/en not_active Expired - Lifetime
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- 1998-04-01 CN CNB988064723A patent/CN1143567C/en not_active Expired - Fee Related
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- 1998-04-01 DE DE19882325T patent/DE19882325T1/en not_active Withdrawn
- 1998-04-01 GB GB9924748A patent/GB2341761B/en not_active Expired - Fee Related
- 1998-04-01 AU AU67942/98A patent/AU743553B2/en not_active Ceased
- 1998-04-01 BR BR9808968-4A patent/BR9808968A/en not_active IP Right Cessation
- 1998-04-01 WO PCT/US1998/006497 patent/WO1998048392A2/en active IP Right Grant
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| GB2341761A (en) | 2000-03-22 |
| GB2341761B (en) | 2002-06-26 |
| BR9808968A (en) | 2000-08-01 |
| AU6794298A (en) | 1998-11-13 |
| AU743553B2 (en) | 2002-01-31 |
| US6477362B1 (en) | 2002-11-05 |
| DE19882325T1 (en) | 2000-07-13 |
| GB9924748D0 (en) | 1999-12-22 |
| CA2287896A1 (en) | 1998-10-29 |
| CN1262017A (en) | 2000-08-02 |
| WO1998048392A3 (en) | 1999-01-21 |
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